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Synonyms for Variety (same or very similar meaning)

WordNet sense 1 (a collection containing a variety of sorts of things):
assortment, miscellanea, miscellany, mixture, motley, potpourri, smorgasbord, salmagundi, mixed bag

WordNet sense 2 (a show consisting of a series of short unrelated performances):
variety show

WordNet sense 3 (a category of things distinguished by some common characteristic or quality):
form, kind, sort

WordNet sense 4 (a difference that is usually pleasant):

WordNet sense 5 (noticeable heterogeneity):
diverseness, diversity, multifariousness

From the ODE community, based on WordNetadd/edit